Mechanical movement for coil winding machine



Oct. 25, 1960 E. J. KING, JR

MECHANICAL MOVEMENT FOR COIL WINDING MACHINE Filed NOV. 21, 1957 United States Patent Ofiice 2,957,634 Patented Oct. 25 1960 MECHANICAL MOVEMENT FOR COIL WINDING MACHINE Edward J. King, .Ir., Leawood, Kans., assignor, by mesne assignments, to Collins Radio Company, Cedar Rapids, Iowa, a corporation of Iowa Filed Nov. 21, 1957, Ser. No. 697,935

4 Claims. (Cl. 2424) This invention relates in general to coil winding machines and more particularly to synchronized controls of toroidal coil winding machines.

In prior art machines the toroidal coil winding machines utilized a broken-ring bobbin interlinked with the toroidal core or coil form for winding wire thereon. A vise or clamp is used to hold the coil form and control its position for control of the resultant coil of wire. Separate tools or controls on the machines were used, requiring the operator to make a great multiplicity of motions in operating a machine of this nature.

It is an object of the invention to provide a synchronized control system for a toroidal coil winding machine.

It is a further object of this invention to provide a coil winding machine providing better controls for the operators use, leaving the operators hands free for more essential operations.

It is a feature of this invention that a single foot pedal actuates a cam shaft which opens the broken-ring bobbin and the coil form clamp in a predetermined cycle, providing improved use of the machine.

Further objects, features, and advantages of the invention will become apparent from the following description and claims when read in conjunction with the drawing, in which:

The figure shows an isometric view from the rear showing specifically the inventive portions.

In the figure a toroidal coil winding machine is shown having a broken-ring bobbin 1t) interlinking a toroidal coil form 11. The break in the ring bobbin is usually a shallow V in a substantially radial plane. The broken-ring bobbin is mounted on three flanged rollers 12, 13, and 15. Two of these rollers, 12 and 13, are mounted on a mechanism enclosed by a box 16. Within box 16 is the drive mechanism for the driving rollers 12 and 13 and linkage for coupling to the other portions of the machine for the winding operation. These parts are not shown since they are not part of the invention. The third roller or idler 15, establishing the plane in which the bobbin 10 is mounted, is mounted on an arm 17. Idler 15 is mounted so as to roll freely.

Idler arm 17 is mounted on a shaft 18 which has a hearing 19 supporting it for rotation and longitudinal motion along the axis of shaft 18. Bearing 19 is mounted in the base 20 which carries the various parts of the coil winding machine in operative relation.

Dependent from base 20 is a pair of arms 21 and 22 which mount the cycling cam shaft 23. Cycling cam shaft 23 is mounted for free rotation but is restrained axially from any substantial motion. On cam shaft 23 are mounted two cams, the bobbin opening cam 24 and the vise opening cam 25. These cams are mounted rigidly on cam shaft 23. Also mounted rigidly to cam shaft 23 is a bell crank 26. This bell crank has attached to its outer end a shaft or rod 27 communicating with foot treadle 28. Foot treadle 28 is mounted adjacent the floor and in the area of the operators normal foot position. The operator is then able to reach foot treadle 28 readily.

Riding on bobbin opening cam 24 is a cam follower 30 mounted on an arm 31 extending from shaft 18. A follower spring 32 provides additional pressure, keeping the cam follower against the cam. The bobbin opening cam has three surfaces. A first surface 33 of constant radius effectively permits the vise opening cam 25 to actuate. A second surface 34 is very gradual in rise and has the effect of springing open the broken-ring bobbin within its own plane into a C shape. A third cam section 35 has a drastic rise which, due to the pressure already involved in opening the bobbin against its own springiness, causes the cam follower to twist and thus the shaft 18 to rotate. This rotation spreads open the bobbin laterally or out of the plane determined by the ring so that the bobbin is now opened quite widely.

The vise opening cam follower 25 is cycled relative to the bobbin opening cam 24 such that the vise is opened immediately upon motion of cam shaft 23 and then held open during the remainder of the rotation.

The toroidal coil form 11 is clamped in the vise or clamp 42. This vise is mounted by an arm 43 from a pivot 14. The pivot is on the axis of the center of the coil form, permitting rotation of the vise about the pivot for advancing the coiled wire around the torus of the form. The arm 43 may be coupled through pivot 14 to the remainder of the mechanism in box 16 in a manner well known in the art which is outside the scope of this invention. Inside of tube 44 which mounts vise 42 on the arm 43 is a clamp spring 45 and an actuating rod 46. A vise release linkage 47 in the form of a scissors couples tension wire 48 to the actuating rod 46. Additional tension on wire 48 actuates the vise linkage 47 so as to push open the vise 42. Release of the tension on wire 48 permits clamp spring 45 to close the vise and clamp the coil form therein.

A bell crank 49 is mounted on the lower end of arm 22. One end of bell crank 49 carries a cam follower 50 which rides against the vise opening cam 25. The other end of bell crank 49 is attached to tension wire 48, completing the linkage between the cam shaft 23 and the vise 42.

In operation, the operator inserts a coil form 11 in the position shown, loads wire onto bobbin 10 and then, holding the start end of the wire, runs the bobbin 10 by means of mechanism 16 to wind the wire onto the coil form. Upon completion of the coil, the remaining wire is removed from the bobbin.

The operator then presses on treadle 28. This rotates cam shaft 23. Immediately the vise or coil form clamp 42 is released, loosening the toroidal coil in the operators hands. Further motion of the treadle 28 then spreads open the bobbin 10 into a C-shape and then distorts it sidewise so as to provide facile removal of the toroidal coil from its interlink with the bobbin.

A new coil form is brought down over the opened end of the bobbin and placed within the area of the vise. The operator then releases the treadle 28, permitting the mechanism to return to the pictured form. The idler arm .17 swings back so that the bobbin is within its own plane and then swings down on the shaft 18, permitting the bobbin to close. Further motion then releases the tension on the vise release linkage to permit the vise '42 to close on the coil form.

Although this invention has been described with respect to particular embodiments thereof, it is not to be so limited because changes and modifications may be made therein which are within the full intended scope of the invention as defined by the appended claims.

I claim:

1. In a toroidal coil Winding machine of the type employing a split ring bobbin insertable in a coil form, mounting means for said bobbin adapted to rotate said bobbin about its axis, and clamping means for holding said coil form; means for sequentially releasing said clamping means and separating said bobbin comprising, an idler operatively communicating with said bobbin, mounting means for said idler, a first cam follower operatively connected to said idler mounting means, a cam shaft, first and second camming means operably connected to said cam shaft, means for holding said first cam follower in cooperative engagement with said first camming means, said clamping means operatively connected with a second cam follower, means for holding said second cam follower in cooperative engagement with said second camming means; whereby rotation of said cam shaft sequentially effects release of said clamping means, outward radial displacement of said idler with respect to the axis of said bobbin, and lateral displacement of said idler with respect to the plane of said bobbin respectively.

2. Clamp release and bobbin separation means for a coil winding machine as defined in claim 1 wherein said bobbin mounting means comprises a plurality of roller members in driving engagement with the inner surface of said bobbin ring, each said roller means rotatable with respect to a mounting frame; said idler mounting means comprising a shaft member, said shaft member rotatably and slidably received in said mounting frame, a first arm member extending laterally from one extremity of said shaft member in a plane substantially parallel to that of said bobbin ring, said idler rotatably mounted in said arm member, said first cam follower comprising a second arm member extending laterally from the other extremity of said first member in a plane substantially transverse that of said first arm member; and said cam shaft supported in said mounting frame for rotation about an axis parallel to and displaced from the axis of said bobbin ring.

3. Clamp release and bobbin separation control as defined in claim 2 wherein said first and second camming means comprise first and second sector cams rigidly affixed to said cam shaft and cooperating respectively with said first and second cam followers, spring loading means for said idler mounting means shaft member adapted to resist lateral motion of said shaft member with respect to said mounting frame; said first cam having a first sector portion of constant radius, a second portion of increasing radius and a third portion of sharply increasing radius whereby rotation of said cam shaft effects successive cooperation between said first cam follower and said first, second and third sector portions of said first cam respectively.

4. Clamp release and bobbin separation means as defined in claim 3 wherein said second cam and said cam follower are oriented with respect to said cam shaft such that said second cam follower is activated to operate said clamping means during that sector of said cam shaft rotation during which said first cam follower cooperatively engages the first sector of said first cam.

References Cited in the file of this patent UNITED STATES PATENTS 1,807,651 Derry June 2, 1931 2,326,969 Quinlan Aug. 17, 1943 2,704,637 Redlich Mar. 22, 1955 

